NEUTRAL: For runners who need a balance of flexibility and cushioning Breathable lightweight flat knit upper for comfort External heel counter enhances support and locks in heel Deluxe foam sock liner conforms to the shape of the foot to prevent slippage and provide a comfortable underfoot support HOVR: High-energy return cushioning foam envelops the energy web to prevent power distribution, converts landing impact to propulsion Carbon placed under the heel Rubber pods are designed for impact Increased traction and durability in larger strike zones equivalent to REGULAR B